Converter tests:

Change test data files extension to "java"

j2k/tests/testData/ast/labelStatement/complicatedExampleFromJavaTutorial.java

@@ -0,0 +1,2 @@
+//statement
+    test:        for (int i = 0; i <= max; i++) {            int n = substring.length();            int j = i;            int k = 0;            while (n-- != 0) {                if (searchMe.charAt(j++) != substring.charAt(k++)) {                    continue test;                }            }                foundIt = true;            break test;        }        System.out.println(foundIt ? "Found it" : "Didn't find it");    }}